Re: Fatal Error...

This is a DirectX related error. The latest version available for Windows 2000 is v8. I’m not sure, but I think that even Skype 5.0 requires at least DirectX v9.0c. Probably you will need to use an even older Skype version, e.g. 4.2.

Re: Fatal Error...

That would work, but there are other threads showing that 5.0 works on W2K, assuming DirectX is in place.

DirectX 9.0c used to support W2K, but MS helpfully dropped support for it apparently around February 2010. This is the last one that's supposed to install (they don't even mention W2K in the supported OS's):